Improvement in harvesters



UNITED STATES PATENT OFFICE.

DAVID S. MONAMARA, OF NORTH HOOSIOK, NEW YORK.

IMPROVEMENT IN HARVESTERS.

Specification forming part of Letters Patent No. 21,612, dated Stptember28,1858.

To all whom it may concern.'

Be it known that I, DAVID S. MCNAMARA, of North Hoosick, in the countyot' Rensselaer and State of New York, have invented a new and vImprovedGrain and Grass Harvester; and I do hereby declare that the following isa full, clear, and exact description of the same, reference being had tothe annexed drawings, making apart of this specification, in which-Figure l is a side sectional elevationof my invention, taken in the line.r x, Fig. 4. Fig. 2 is an end View of the same. Fig. 3 is a detachedback view of the frame of the same. Fig. 4 is a plan or top view of thesame.

Similar letters of reference indicate corresponding parts in the severalfigures;

This invention consists in constructing the frame of the machine in apeculiar manner, as hereinafter fully shown and described, where bygreat strength with lightness is obtained and suitableprovisionmadeforstraining77 the frame or bringing it back to its original properposition in case certain parts become casually displaced by use and aremade to lassume undue positions detrimental tothe perfect operationofthe machine.

To enable those skilled inthe art to fully understand and construct myinvention, I will proceed to describe it.

A, Figs. 1 and 4, represents what isgenerally known as the main frameofthe machine, it being that portion in or on which the driving-gear isplaced.

B is the driving-wheel, which is placed on a stationary axle, O,attached permanentlyT to the main frame A, the wheel B being at theouter side of the frame A, as plainly shown in Fig. 4. The main frame isformed of two inclined bars, a I), connected at their front ends by abar, c, which bar has an oblique position relatively with the bar Z1.The back ends of the bars c b are connected to a bar, cl, which eX-tends the whole length ofthe frame, as shown clearly in Fig. 4. The bard, like c, has an oblique position relatively with the bars o b, asshown.clearly in Fig. 4. The front end ot' the bar a' is attached to ametal shoe, e, which rests on the ground; but the other bar does nottouch the ground, its front end being more elevated than a. The two barsa b therefore are not in the same plane, and the back end of bar a isattached to the upper surface of d, it being fitted thereto by ashoulder, f. The

to pass through.

back end of bar b is secured to the under side of d, the end of bar bbeing recessed to receive d. The front end of bar b is secured to thetop or upper surface of bar c, while the front part ot' a is attached tothe under snrface of c.

D is a metal rod or truss which passes transversely through the bars ab, and has a nut, g, on its inner end.

E is a metal rod or truss, one end of which passes through the bar a.,and the opposite end passes through the bar d about midway between thebar a and the outer end of bar d. (See Fig. 4.) The rod or truss E has anut, h, on its end, at the outer side of bar d.

F is the nger-bar, one end ot' which is attached to the shoe l, and theother end is attached to a shoe, G, by means of a tenor, t', whichpasses into a inor'tise or opening,j, made horizontally through theshoe, the shoe being secured to the fin ger-bar by a bolt, k.

H is the end piece of the frame. This end piece is attached at its outerend to the bar d, and its front end is attached to the shoe G, the frontpart of H having a recess, l, cut into its under side to allow the endof the sickle I The shoe G is attached at its front and back ends to theend piece, H, as shown clearly at M, Fig. 2.

To the front end of the bar I) a metal diskshaped` guard, J, isattached. This guard projects upward in front of the crank-pulley ai,which drives the sickle, and protects said pulley from the cut grass orgrain, which might otherwise become entangled with it.

The bars a b c d, end piece, H, and finger-bar F are all ot' wood, andthe parts are secured together by bolts in a proper manner.

K is a rod or truss, one end of which is attached to the bar d near itsouter end, as shown ato. This rod K passes under a bridge or pendant, p,attached to the side of bar d, and also passes through the back part ofthe bar b, and hasa screw-nut, L, on its end. (See Fig. 3.)

From the above description it 'will be seen that the front end ofthe baror or the shoes c,

tested and has 'been found to answer an ad-n mirable purpose.

All parts ofthe frame, owing to the rods or trusses E D, are made tobear a proportion ot1 the strain to which the frame is subjected, andthe oblique positions of the bars c d relatively' with the bars t b alsoadd greatly to stifen the frame. By having the front of the end piece,I-I, attached to the shoe G at its back and front end, as shown, the

shoe is rendered perfectly strong, and the Weakness which is'caused bythe mortise or openingj is fully compensated for, and the fn-` ger-bar Ltherefore allowed to be secured to the shoe by means of the tenon andmortise, which could not otherwise be done', and a substantialconnection formed.

What I claim as my invention, and desire to secure by Letters Patent, isY l. Constructing the frame of the machine ot' the bars a b c d, endpiece, H, and fingerbar Ii, in connection with the trusses E, D, and K,when the Whole are arranged substantially as and for the purposes setforth.

2. In combination with the frame construct ed as above, the shoe Gr,when constructed as described, and secured to the finger-bar F and endpiece, H, in the manner and for the purposes set forth.

'DAVID s. MCNAMARA..

Witnesses:

G. Y. ATLEE, H. H. YOUNG.

